Lubricating-oil-pumping apparatus



I March 18, 1924.

` 1,487,650 L. FRIEDMANN LUBRICATING OIi PUMPING APPARATUS Filedmprii 25 1922 Figi Patented Mar.' 18, 1924.

UNITED ST 'I' E S LOUIS FRIEDMANN, 0F VIENA, AUSTRIA.

LUBRICATING-OIL-PUMPING APPARATUS.

Application mea April 25, 1922. serial No. 556,425.

To all whom t may concern."

Be it known that I, Louis FRIEDMANN, a citizen of the Republic of Austria, resident of Vienna, Austria, have invented certain new and useful Improvements in Lubricating-Oil-Pumping Apparatus, of which the following is a specication.

This invention has for its object to provide an improved valveless lubricating oil pumping apparatus for lubricating the internal parts of a locomotive which are under steam pressure. This apparatus comprises two cylinders located in a common casing. These cylinders, hereinafter designated the pumping cylinder and the distributing cylinder respectively, comprise each a corresponding piston and the motion of the two pistons is such that the pumping piston makes twice as many strokes as the distributing piston, thus enabling two oil ducts to be supplied with oil alternately.

In the improved apparatus one of these two oil ducts leads to a place of consumption, that is to say, the part which is to be lubricated. The other of these two oil ducts opens into a pipe which is located in the oil vessel and which delivers into the interior of the said oil vessel, and in fact at the upper part of the same beneath the lid of said oil vessel.

If this lid be removed and the pumping apparatus be started it will then be possible to perceive the oil passing out from the aforesaid pipe located in the oil vessel so that it can be seen whether the pump is working. By reason of the fact that the aforesaid pipe delivering into the oil vessel is located under the fastening of the lid the said pipe is eii'ectually prevented from being bent or otherwise damaged.

Since the point of consumption or part to be lubricated is usually under a high steam pressure the outlet leading to the said point or part must consequently overcome a much greater pressure than the outlet delivering into the oil vessel and therefore, if the qualities of oil delivered into the oil vessel are not to be much greater than the quantities of oil pumped to the point of consumption, the dead space under the pumping piston must be made as small as possible because even though oil is incompressible the oil will yet contain small quantities of air which diminish in volume when the oil is compressed; consequently if the stroke of the pumping piston is made variable the dead space must not become greater whenv the piston stroke is diminished.

In this lubricating oil pumping apparatus there -is employed a regulating mechanism whereby the pumping piston is always pushed to an equal distance into the cylinder whereas the stroke of the piston from out of the cylinder can be made greater or smaller according to the adjustment of the regulating mechanism.

An embodiment of the invention is illustrated by way of example in the accompanying drawings, in which Figure l is a longitudinal section of the improved pumping apparatus, and

Figure 2 is a cross-section thereof.

In Figure 1: l is the pump casing containing the distributing cylinder 2 for the distributing piston 4; Land the pumping cylinder 3 for the pumping piston 5; 6 is the admission duct for the admission of the oil; 7 is an exit ductfor the exit of the oil on its way to the point of consumption or part to beV lubricated; 8 is an exit duct for the delivery of the oil into the oil vessel by way of the pipe 9 which opens into the upper pa-rt of the said oil vessel.

According to the position of the distributing piston 4 the cylinder space 3 is placed during the delivery stroke in connection with the duct 7 and duct 8 alternately. The motion of the two pistons is produced by means of two 'rocking levers both mounted on the shaft 11. Of these two levers, the lever 1() is connected by means of its arm 18 to the distributing piston 4 while its other arm has. a bell-shaped recess in which engages an eccentric 12. This eccentric is fixed to a shaft 13; on the same shaft 13 there is mounted and fixed to it a double tappet lawhich is adapted to press downwardly and positively on a lever 15 that is mounted on the shaft 11. A means such as a spring 16 is provided for moving the lever back in a reverse direction. On the end 19 of the lever 15. is an adjusting screw 29; which' may be fixed by a nut 22a and is provided at its lower end with a head 17 engaging a recess 5a in the piunping piston 5.- This recess 5a is of such length 'as'.to permit a limited longitudinal movement of the head 17 with respect to the piston 5. 'When the screw 22 is screwed downwardly with the piston 5 in its uppermost position, the head 17 is displaced from the upper terminalof the recess 5a and thus, subsequent to the CII o during a portion or" its upward movement, will reduce the rip-stroke of the piston in proportion to the displacement ofl the head 17 from its normal position as indicated in Figure 1. In this manner, the length of the stroke of the piston 5 may be varied as desired, although it will be noted that the variation only eects the limit ot the upward movement of the piston, whereas the limit of the downward movement thereof remains the same regardless ot the adjustment' of the screw 22. lhen the shaft. 153 is rotated, the two le-vers 10 and 15 will rock in such a manner that in a complete revolution ot the shaft 13 the arm 18 actuating the distributing piston will make one to-and-fro rocking movement whereas the. arm 19 will malte two tovand-tro rocking movements. During this motion the pumping piston 5 will be pushed into its cylinder always to one and the same extent, whereas it will bel pushed out of the cylinder to a lesser or greater extent according as the amount oi play between the parts 17 and 19 is greater or smaller.

hen the apparatus contains a plurality of lubricating pumps as illustrated in Figure 2 it is advisable to employ for actuating the distributing piston two levers 18 which are connected together by a bar 23 and engaged correspondingly with the piston. For actuating these'leversvit is advisable in this case to employ two eccentrics 12.

I'Vhat I claim is 1'. In a lubricating oil pumping apparatus, the combination oi: an oil vessel fitted with a lid, an oil pump comprising a pumping` cylinder and piston, a distributing'cylinder and piston, oil conducting means connecting` said pumping and distributing cylinders, said distributing cylinders having an oil admission duct and two oil delivery ducts9 one ot said oildelivery'ducts leading to a place ot consumption, and a pipe for receiving oil from another of said. oilV delivery ducts and deliif'ering said oil underneath said lid into said oil vessel, and means 'for actuating said pistons comprising a shaft.` two rocking levers on said shaft, an eccentric i'or actuating one of saidV two rocking levers for operating'said distributing piston` and a double tappet tor actuating the other ot said two rocking levers for operating said pumping piston.

2. In a lubricating' oilV pumping apparatus, the combination of an oil vessel fittedV with a lid, an oil pump comprising a pumping cylinder and piston, a distributing cylinder and piston, oil conducting means connecting' said pumping and distributing cylinders, said distributing cylinders having an oil` admission duct and two oil delivery ducts, one ot said oil delivery ducts leading toa' place ot consumption, and a pipe for receiving oil from another of saidoil delivery ducts and delivering said oil underneath said lid into said oil i-'es'seh and means tor actuating said pistons comprising a shaftl` two rockingr levers on said shaft, an eccentric for actuating one offsaid two rocking'levers for operatingsaid distributingpiston, and a double tappet for actuating the other of said two rocking levers for operating' said pumping piston, an adjustable member located on the end o't said other rocking lever for operating said delivering` piston, and means for connecting said other rocking lever to said delivel-ing` piston in such a manner that said adjustable member shall Ymove said delivering piston outof its-cylinderJ whereas said other rocking member will force it into its cylinder. y

3. In a lubricating oil pumping apparatus, the combination of' an oil vessel fittedl with a lid, a plurality of oil pumps each comprising a pumping cylinder and piston, a distributing cylinder and piston, oil conducting means duct' connecting said pumping and distributing cylinders, said distributing cylinders having an oil admission luct and'twooil delivery ducts, one of said oil delivery ducts leading to a place of consumption, and a pipe 'for receiving oil from another of said o'il delivery ducts and delivering said oil underneath said lid into said oil vessel; means for actuating said plurality of pumping pistons, comprising a shaft, a rocking'lever on said shaft, and a doubleA tappetv for actuating said rocking lever tor operating said plurality oi pumping pistons; and two rockingV levers on said shaft, connected by a connecting bar for operating saidv plurality ot" distributing pistons.

In testimony whereof l" have signed my name to this speriication.

LOUIS FHIEDIANN.

llVitnesses CARL SoNDnNnmie, I-Ini Muon Mi sciriiovioii. 

